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Commit 0a5642be authored by Vinod Koul's avatar Vinod Koul
Browse files

dmaengine: freescale: add and export fsl_dma_external_start() 



The freescale driver uses custom device control FSLDMA_EXTERNAL_START to
put the controller in external start mode.
Since we are planning to deprecate the device control, move this to exported
API. Subsequent patches will remove the FSLDMA_EXTERNAL_START

Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent b65612a8

drivers/dma/fsldma.c

+15 −1
Original line number Diff line number Diff line
@@ -36,7 +36,7 @@ 
#include <linux/of_address.h>

#include <linux/of_irq.h>

#include <linux/of_platform.h>



#include <linux/fsldma.h>

#include "dmaengine.h"

#include "fsldma.h"
@@ -367,6 +367,20 @@ static void fsl_chan_toggle_ext_start(struct fsldma_chan *chan, int enable) 
		chan->feature &= ~FSL_DMA_CHAN_START_EXT;

}



int fsl_dma_external_start(struct dma_chan *dchan, int enable)

{

	struct fsldma_chan *chan;



	if (!dchan)

		return -EINVAL;



	chan = to_fsl_chan(dchan);



	fsl_chan_toggle_ext_start(chan, enable);

	return 0;

}

EXPORT_SYMBOL_GPL(fsl_dma_external_start);



static void append_ld_queue(struct fsldma_chan *chan, struct fsl_desc_sw *desc)

{

	struct fsl_desc_sw *tail = to_fsl_desc(chan->ld_pending.prev);

include/linux/fsldma.h

0 → 100644
+13 −0
Original line number Diff line number Diff line 
/*

 * This is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */



#ifndef FSL_DMA_H

#define FSL_DMA_H

/* fsl dma API for enxternal start */

int fsl_dma_external_start(struct dma_chan *dchan, int enable);



#endif